Hello Gang:
Again, having a cell size of n=1 does NOT necessarily preclude one from
conducting ANOVA. In particular, for the 2 factor ANOVA mixed effects model
(i.e., 3dANOVA2 -type 3), the F-test for factor A main effect is calculated:
F(A) = MSA / MSAB, where MSAB = SSAB / (a-1)(b-1).
Here, a = #levels of Factor A (say, 4), and b = #levels of Factor B (say, 14).
Hence, the denominator degrees of freedom for the F-statistic is given by:
df = (a-1)(b-1) = 3*13 = 39.
For more details, please see the documentation in file 3dANOVA.ps.
Doug Ward